Do I Need an Architect for My Renovation? (London, 2026)

Key Takeaways

Not every renovation needs an architect, but complex and design-led projects benefit.
Alternatives include architectural technologists, designers and design-and-build contractors.
Architect fees are commonly 8 to 15% of build cost for a full service.
Simple, like-for-like work rarely needs an architect.
Design-and-build keeps design and construction under one accountable team.

One of the first questions homeowners ask is whether they need an architect. The honest answer is: sometimes. It depends on the complexity and ambition of your project. Here is how to decide, and what the alternatives are.

When an architect adds value

An architect earns their fee on projects where design is the priority or the challenge is real: complex layouts, difficult sites, architecturally ambitious schemes, large or unusual extensions, and listed buildings. They bring spatial creativity, technical detailing and design leadership that can transform what a space becomes.

When you may not need one

For simple or like-for-like work, a kitchen or bathroom renovation, a straightforward extension, or internal updates, a full architect service is often more than you need. What you actually require is accurate professional drawings for planning and building control, plus sound design and structural input.

The alternatives

Architectural technologist: produces technical drawings and detailing, often at lower cost than an architect.
Interior or kitchen designer: for layout and specification within an existing footprint.
Design-and-build contractor: handles design and construction under one roof, which removes the coordination gaps that appear when separate parties hand off to each other.

Fees and value

A full architect service commonly costs 8 to 15% of the build cost, with smaller packages (such as drawings only) costing less. The question is not simply cost but value: on an ambitious project, good design pays back many times over; on a simple one, it may be an unnecessary layer.

How to decide

Ask how complex and design-led your project really is. For most London renovations and extensions, a capable design-and-build team provides the drawings, design and construction you need with a single point of accountability. For architecturally ambitious or highly bespoke projects, an architect is worth it. GS Renovation offers design and build under one roof across London. For honest advice on what your project needs, contact us or call 07472 424 226.

The GS Renovation Team

GS Renovation & Home Improvements has delivered kitchen, bathroom, structural and extension projects across London for over 30 years. This guide reflects current UK industry pricing and our hands-on site experience.

Frequently Asked Questions

Do I need an architect to renovate my house?

Not always. Simple or like-for-like renovations rarely need an architect, while complex, structural or design-led projects, such as a large extension or full remodel, benefit from architectural design. For many London renovations, an architectural technologist or a design-and-build contractor can provide the drawings and design needed at lower cost.

How much does an architect cost?

Architect fees for a full service commonly run 8 to 15% of the build cost, or a fixed fee for defined stages such as planning drawings. A smaller package, for example planning and building regulations drawings only, costs less. The right level of service depends on the complexity and how much design input you need.

What is the difference between an architect and a design-and-build contractor?

An architect designs the project and can oversee a separately appointed builder, while a design-and-build contractor handles both the design and the construction under one roof. Design-and-build reduces coordination gaps and is efficient for most renovations, whereas an architect-led route suits highly bespoke or architecturally ambitious projects.

Can I get planning permission without an architect?

Yes. You do not legally need an architect to submit a planning application; you need accurate, professional drawings, which an architect, architectural technologist or design-and-build contractor can produce. What matters for approval is the quality and suitability of the design, not the title of who drew it.

When is an architect worth it?

An architect is worth it for complex layouts, challenging sites, architecturally ambitious designs, listed buildings, and projects where design quality is the priority. For straightforward extensions and renovations, a design-and-build contractor or technologist usually delivers the needed drawings and design more cost-effectively.

Do I Need an Architect?